Roundel holder



May 19, 1931. R. E. MAJOR ROUNDEL HOLDER Filed Feb. 6, i930 11/527256565 fi/ f/b we.

May 19, 19.31.

R. E. MAJOR 1,806,209

ROUNDEL HOLDER Filed Feb. 6, 1930 2 Sheets-Sheet 2 16 i, I I: 13

I v [720672207 ZL'ZZ7Z65Q619 5 7/2 /0 4J4 M, 7PM W Patented May 19, 1931teeazee FFEQE ROSCOE E. MAJOR, OF CHICAGO, ILLINOIS, ASSIGNOR TO MAJOREQUIEMENT 00., INC, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOISEOUNIJEL HOLDER Application filed February 6, 1930. Serial No. 426,297.

ferred to are used extensively in theaters,

public halls and exhibition rooms and the like, especially wherereflectors are used and where color effects are desired. They are muchused in connection with'indirect or flood lighting and in many instancesare only accessible from the rear of the fixture, as when the lights arehigh up on the walls or are in or near the ceiling, as in cove lighting.Roundels of various sort are commonly set each in the mouth of a bellshaped shell or lamp housing of a general type such as illustrated inthe accompanying drawings.

In theatre lighting especially, the lamp housings or reflectors, usuallyof single lamp unit style are often placed in positions where accessfrom the front is either impractical or not permissible. The maintenanceoperator can only reach such units with one hand through a special rearwall opening provided for the purpose, as will be more fully described,and he must be guided in making changes entirely by the sense of touch.For this purpose the fastener or look must be easy to operate and musthave no movable parts such as might get lost; and the lock must beentirely positive and reliable. Heretofore these needs have not beenmet.

The main objects of this invention are to provide an improved, simpleand substan- 40 tial holding device for the roundel, lens or screen; toprovide a self contained and re liable mechanism of this sort with noremovable parts; to provide a roundel holder construction which themaintenance'attendant may gain manual access to and operate by the senseof touch; to so provlde that he may then remove and replace the lens orother member and finally restore the unit as a whole to normalcondition, all with one hand; to provide a lamp housing or reflectorwith a roundel holding rim of substantially rigidform and adapted toembracingly grip the roundel releasably' by simple rotary movement; toprovide for telescopic action of complementary arcuate peripheral edgegripping means; to unify the movable locking means; and to assureconstant positive alinement of the coacting complementary telescopicholding members.

An illustrative embodiment of this invention is shown by theaccompanying drawings in which:

Figure 1 is a front elevation of a single lamp unit reflector type ofroundel holder, with the lens inplace and with the lock closed.

Fig. 2 is a fragmentary axial section on the line 22 of Fig. 1, andshows the conoidal bell shape of the reflector shell or roundel holder.

Fig. 3 is a fragmentary side view of the device as viewed from the leftof Fig. 1..

Fig. 4: is a view similar to Fig. 2 but with the lens removed, the lockbeing closed.

Fig. 5 is a front elevation of the device as viewed in Fig. l but withthe fastener wide open and with the lens partly removed.

Fig. 6 is an enlarged section on the line 6-6 of Fig. 5.

Fig. 7 is a perspective view of the device in its open condition andwith the lens removed.

Fig. 8 is a section on the line 8-8 of Fig. 4, the lens being removedand the lock closed.

Fig. 9 is a diagrammatic view illustrating how the lights and roundelholders herein referred to may be positioned and how they may be gottenat from the rear for renewals and repairs.

Referring to the drawings the lighting elementor lamp, not shown, ishoused in a sheet metal shell like reflector or roundel holder 1 securedat its base 2 to a support or fixture 8. The lens, color screen or otherroundel accessory 4 is demountably secured to the reflector rim 5 whichin this instance is formed to receive the roundel 4: edgewise to enterthe inwardly facing edge channel se ment 6, integral with the body 1.' Acomplementary movable channel segment 7 the main axis ofthe reflector isinclinedor horizontally disposed, the shade is posiis telescopicallyrelated to the fixed segment 6, and is so 'proportioned'relativelythereto that when moved to minimally overlie the v 1. same itwillcircumferentially complete the mally overlieth'e segment 6 the holderwill be openand .the roundel 4 may be removedor introduced',-as will beapparent from Fig. 51'

'Morein detail the lock channel disa V I I U range of utility, but it 1sespeclally advanformed by spinning over the edge of the reflector shell1 inwardly as shown at the lower edge 'of Fig. 4 and then cuttingawayabout one hundred and eighty degrees of the cylindrical wallpart .8and corresponding outer flange part .9 as appears in'Fig. 7.

This form of holder Ifreely' admits the r-Qundel 4. In order to providefor effective control and operation of the segment 7, a

peripherally slidable collar'lQ of sheet metal is-attached to the rim ofshade 1,-which collar comprises the complementary channel 7. The collar10 is formed by spinning the innerfa'nd more'restrijcted part to fitsnugly over the corresponding edge part of reflector 1 and then spinningthe outer edgejpart to form achannel ;7 to snugly embrace the fixedchannel- 6.; Then part of-thisl rotary channel'is removed by cuttingaway about half of the 'wall part 11 and end flange12, as apparent fromFig. 7. ,The are of the outer channel segment? is made somewhat greaterthan that of the inner segment 6, preferably about to degrees, so astoaccommodate 7 the stop member 13'on segment 7 and also assuresubstantial overlap of the channels when the lock is, closed. With thisinview the arcrof channel 6 is preferably a little less than 180 and thearc of channel 7 a little greater than 180. A handle 14; is fixed onchannel 7-to facilitate; reciprocation thereof. This handle is carriedby a small angle fitting 15 which is securedby rivet 16 passing throughthe wall 11 and also if desired through the stop block 13. 1 These partsare or may be further unified by solder or brazing. The handle andstop.v unit is slightly spaced from one end of channel 7, so as topermit the over-lapindica'tedat-IS on Fig. 1 when the lock is closed.The overlap on, the opposite side is indicated at 19. Therearwardedgeof-ring 10 is spun outwardly and "backwardly to form a stiffeningroll or bead 20.

When the lock is open the segment :7 I at its stop end slightlyoverhangs the gap 21 of j reflectorhbut the opposite end issubstantially flush with the corresponding end of,

channel 16, as in Fig. 5. f Whenever, as usual,

tio'ned so that the fixed'channel 6 is on the lower side, thus assuringthat gravity will tend to help retain the roundel in place.

' s mm date edgewis admissi n drawings.

The device of this invention has a'wide tageous in cove lighting as inFig. 9. Here the hghtingunlt is set 1n a ceihng cove where the shadeland roundel l are ordlnarily accessible only through a hand hole 31, orthe like, in the wall or ceiling 32; the attendant being positioned onthe eat-Walk? 33. In order to renew the lamp or change the roundel hehasto reach with one. hand through the hole 31, and guided by touch,grasp the'lock handle 14: and then slide the channel ringlOcounterclobkwise, as viewed in Fig 1, to theposition shown in Fig. .5.

After the changes are made the reverse operation is followed w Althoughbut one specific embodiment of this invention is herein-shown anddescribed,

it is tobe understood that nunjierousv details of the construction shownand materials used may be alteredor omitted without d e? parting fromthe spirit of theinvention as defined by the following claims. I

.Iclaim: 7 1. A holder of the class described comprising a pluralityofnormally inseparable annular coaxial members united in mutually rotaryrelation, each having an inwardly facing segmental-a ienate channelformed edgewise t n, said ann a members being 'mutually. nested and thechannels thereof being formed to accommodate mu? tual telescopicadjustment for locking "and for release action. T r

coll idal lamp larger end-fo the interchangeable attache ment of roundelmeans .and comprising a plurality of. .circum'ferentially distributeda-rcuate members formed and adapted to en-J gage theedges of the roundelmeans, said ar'cuate membersbeing mutually. slidable manually to more orless overlap for lateral opening-of the engaging means whereby to and.re= lease of the roundelmeans-1, I

3. A. conoidallampreflector fitted at its larger end for theinterchangeable attachment of roundel means and comprising a.

plurality of circumferentially distributed arcuate membersformed andadapted =to engage the'edges of the roundel means, one of said membersbeing integral with the reflector and another of said mem'bers beingtelescoplc ally related thereto whereby it may be moved tooverlapthesame for'releasing the roundel means and may also be moved to supplementthe said integral member for securing the roundel means in place.

4. A circular rimmed lamp reflector having on its rim a roundel holdercomprising a pair of mutually supplemental and circumferentiallyarranged inwardly facing channel members, one of which is integral withthe reflector and the other being peripherally slidable to lock and torelease the roundel, the latter channel member having an annular supportintegral therewith to slidably engage the rim of said reflector.

5. A device of the class described comprising a circular rimmed lampreflector having a pair of mutually nested conoidal rings each formedwith an arcuate inwardly facing channel, one of said rings beingintegral with the reflector and the other being slidablecircumferentially thereon to vary the mutual relation of the saidarcuate channels, the movable outer channel having a stop thereinadjacent to one end to limit opening and closing movement by contactwith the ends of the fixed channel and also prevent axial displacementof the movable ring by sliding contact with the fixed ring.

Signed at Chicago this third day of February, 1930.

ROSCOE E. MAJOR.

